IRON MTN-KINGSFORD WWTP, MI

Average of Minimum Temperature (Degrees Fahrenheit)

(204090)

File last updated on April 20, 2024
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)	JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC		ANN
1899	-----	z	-1.93	a	6.26		32.00		41.84		49.97		54.84		55.87	a	41.27		38.90		30.80		12.65		32.95	a
1900	12.42		-2.29		9.26		35.23		41.87	a	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	19.30	g
1901	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	45.19	i	37.19		21.60		8.78	d	22.52	i
1902	6.68		8.33	a	24.33	a	30.38	a	41.58		46.96	d	55.19		50.55	b	44.23		34.06		27.68	b	11.58		31.80
1903	5.39		6.61		24.90	a	30.07		42.32		47.77		55.19		51.26		45.48	a	35.26		19.23		5.19		30.72
1904	0.52		-7.03		16.61		26.13		41.17	a	50.31	a	53.40	a	50.19		44.30		35.53	a	26.63		8.70	a	28.87
1905	-0.23		0.71		17.52		29.53		39.52		50.00		54.19		53.77		48.03		34.57	a	25.32	b	14.60	a	30.63
1906	13.30	a	4.21		8.06		33.13		38.84		51.83		54.32		56.03		51.10		35.06		27.07	c	13.41	d	32.20
1907	2.03		1.86		19.10		22.70		33.10	a	51.83		53.29		51.13		47.97		31.69	b	23.57		14.48		29.40
1908	9.74		9.21		16.58		30.93		43.00		49.88	e	56.73	a	52.42		51.63		38.21	c	24.86	a	10.80	a	32.83
1909	8.10		12.79		15.79	b	25.90		44.29	c	53.07	b	54.29		55.86	c	46.47		34.32	c	28.07	a	13.27	a	32.68
1910	4.81	e	2.50		26.83	a	32.08	f	37.90	a	54.15	j	58.77	r	54.00		45.43		39.70	a	22.66	a	9.04	d	26.99	c
1911	2.40	a	12.26	a	21.68	i	29.64	b	45.07	a	55.00		55.16		51.19		46.17		35.68		18.70		18.33	a	33.60	a
1912	-11.65		2.25	a	10.71		30.77		41.32		48.03		55.65		50.97		47.60		35.87		24.62	a	14.52		29.22
1913	6.79	b	0.43		11.84		32.13		39.71		53.23		54.23	a	54.63	a	44.89	b	35.87	a	29.14	a	21.80	a	32.06
1914	13.03		-1.04		17.32		26.83		44.32		50.07		58.06		53.37	a	45.93	a	41.39	c	24.50		9.29		31.92
1915	2.71		16.85	b	16.87		38.37		38.68		46.47		53.77	a	49.39		47.40		37.55		27.57		14.35		32.50
1916	5.42		3.45		11.58		31.43		40.45		49.03		61.42		56.10		46.57		35.90		24.07		8.03	b	31.12
1917	0.77		-4.31	b	16.60	a	27.77		36.52		46.67		56.48		50.06		44.53		30.77		25.57		4.42		27.99
1918	-2.00		2.75		24.00		25.90		43.74		48.00		56.03		55.55		41.20		38.23		29.47		19.32		31.85
1919	12.32	c	12.64		18.27	a	31.14	a	39.97	a	59.00	a	60.55		54.52		48.63		35.45		21.77		1.48		32.98
1920	-2.06		5.78	b	18.03		25.57		36.19		53.14	a	53.81		52.87		47.03		44.26		-----	z	18.48		32.10	a
1921	9.70	a	10.48	a	18.13	a	38.28	a	46.90		59.03		65.55		54.65		51.87		38.26		21.07		12.13		35.50
1922	1.94		3.75		17.00		30.33		48.10		51.93		56.58		53.68		49.40		36.97		30.70		9.81	d	32.52
1923	6.77		-2.29		8.42		26.53		38.65		54.50		56.61		51.26		47.23		31.48		26.30		21.52		30.58
1924	-4.17	b	12.07		19.26		29.43		34.65		47.13		51.48		52.13		42.87		39.65		24.43		3.06		29.33
1925	6.40	a	10.36		18.52		32.73		36.29		53.73		54.94		55.10		48.10		29.26		22.50		11.61		31.63
1926	6.17	a	9.54		10.97		25.13		39.06		46.67		54.71		53.97		44.77		33.16		20.60		5.52		29.19
1927	3.29		8.19	a	24.13		29.13		38.10		46.90		52.10		47.65		49.13		37.52		23.38	a	3.43	c	30.24
1928	10.97	a	7.34		15.71		25.77		41.65		47.20		56.29		54.16		36.60		38.16		27.50		17.03		31.53
1929	-3.94		-0.39		21.03	a	30.80		38.19		48.37		54.90		52.10		46.30		36.23		20.70		11.39		29.64
1930	1.70	a	12.25		17.16		30.13		43.94		53.00		54.87		53.55		45.97		36.16		26.00	a	14.19		32.41
1931	13.61		17.89		20.52		30.00		39.23		53.70		57.61		51.45		52.73		41.39		30.83		22.90		35.99
1932	17.23		10.90		13.03		28.10		41.68		52.83		56.35		55.03		45.17		35.10		20.03	a	10.80	a	32.19
1933	13.03		3.39		16.26		29.57		43.42		57.03		56.61		51.97		50.17		33.74		19.34	a	8.32		31.90
1934	14.52		0.36		12.26		29.57		44.94		53.43		56.48		49.77		46.63		38.23	a	28.10		8.26		31.88
1935	2.61		5.82		18.32		27.37		36.16		47.20		59.94		55.32		42.63		35.74		22.73		12.00	a	30.49
1936	2.84		-8.14	a	18.00		24.77		43.48		46.50		56.52		54.50	a	48.97		32.03		19.72	a	13.90		29.42
1937	-0.29		5.86		10.74		27.90	a	38.13	a	48.47		56.45		56.13		42.36	b	37.63	a	30.27		7.69	b	30.11
1938	0.71		9.61		20.52		31.23		41.74		49.83		56.00		55.32		44.27		37.23		24.37		11.71		31.88
1939	7.87		-2.00		11.70	a	25.37		41.81		53.13		55.00		53.77		45.80		35.35		23.13		19.29		30.85
1940	2.67	a	9.69		9.35		24.77		37.13		50.90		54.77		54.48		47.57		38.29		23.86	a	14.58		30.67
1941	9.77		8.21		11.42		32.77		44.42		52.97		55.26		50.48		48.40		36.06		26.47		19.94		33.01
1942	8.17	b	7.29		21.55		32.27		37.77	a	49.00		52.68		52.65		42.77		32.87		20.93		9.32		30.60
1943	1.19		4.04	a	8.13		25.27		39.03		52.63		56.35		53.00		39.10		33.16		20.75	b	10.19		28.57
1944	14.20	a	8.44	b	12.23		24.40		42.94		50.63		52.58		52.45		46.31	a	33.19		30.67		10.94		31.58
1945	2.70	a	5.00		23.90	a	27.93		34.84		45.30		50.87		50.84		43.73		31.16		22.57		8.32		28.93
1946	6.81		3.86		25.77		29.17		36.77		48.93		52.74		49.42		42.17		37.13		24.47		10.81		30.67
1947	7.17	a	6.36		16.00		26.97		36.19		47.27		54.77		60.39		47.13		42.94		21.10		12.19		31.54
1948	-4.00		2.41		11.35		31.60		37.65		48.50		55.45		54.42		45.80		32.77		29.90		11.52		29.78
1949	11.29		6.32		17.48		30.40		39.77		55.50		57.35		53.94		43.10		37.90		24.17		11.48		32.39
1950	1.29		4.75		11.23		23.30		37.23		48.90		51.97		47.77		44.80		39.32		19.60		4.48		27.89
1951	1.06		16.25	x	15.68		30.00		43.72	f	47.97		54.94		50.81		44.20		36.87	a	16.37		10.13		30.80	b
1952	5.35		9.21		13.52		31.03	a	39.65		51.63		56.45		52.87		45.17		27.61		26.10		19.81		31.53
1953	11.65		7.79		19.45		28.70		39.84		51.43		54.42		54.84		45.97		37.55		27.67		15.29		32.88
1954	3.90		16.43		13.81		29.53		35.29		53.30		53.26		51.00		46.10		36.23		27.87		13.68		31.70
1955	4.65		5.89		12.29		35.50		41.71		50.47		59.90		56.35		44.43		37.16		20.50		6.48		31.28
1956	7.97		5.45		11.19		27.13		37.19		50.60		51.77		52.68		41.13		39.10		29.19	i	12.58		30.62	a
1957	-2.16		7.07		15.52		30.13		39.55		50.03		54.48		51.58		42.47		34.06		25.74	g	12.77		30.50	a
1958	11.68		6.11		20.00		29.20		36.52		43.90		52.55		51.55		46.00		38.61		24.60		-0.03		30.06
1959	-2.23		-0.82		13.16		29.00	j	48.00	t	51.37		53.84		57.81		46.63		34.52		15.40		18.42		28.81	b
1960	7.90		8.28		5.19		31.37		40.74		46.97		51.39		52.84		45.80		35.32		26.33		7.74		29.99
1961	2.97		11.54		20.00		26.97		35.42		48.07		54.00	a	52.45		47.43		37.84		23.93		9.42		30.84
1962	1.52		0.54		17.06		27.70		45.81		48.07		50.94		51.23		42.40		37.81		24.67		10.13		29.82
1963	-2.52		-2.86		15.52		28.27		37.42		49.77		53.35		50.87		44.20		42.03		29.40		5.26		29.23
1964	10.29		7.52		15.26		30.47		44.42		48.73		55.81		51.16		44.87		33.84		26.53		6.94		31.32
1965	1.65		0.29		11.81		27.90		43.52		47.87		50.84		52.45		43.57		36.94		24.30		19.58		30.06
1966	-1.58		10.86		21.48		28.07		35.87		52.33		57.87		53.03		44.47		33.87		24.73		13.23		31.19
1967	7.84		-0.79		15.03		28.73		34.16		52.03		52.87		50.13		44.20		36.65		22.37		12.06		29.61
1968	4.35		3.66		21.45		31.73		38.77		51.57		55.23		52.23		49.70		39.58		25.63		11.87		32.15
1969	7.00		7.07		11.90		30.83		39.90		45.17		53.61		55.06		45.33		35.39		22.67		14.48		30.70
1970	-0.90		1.75		12.55		31.40		40.81		50.70		56.77		52.58		47.37		38.68		25.00		10.45		30.60
1971	-1.26		4.96		12.65		26.87		36.32		52.90		52.13		50.03		49.03		44.71		25.53		12.87		30.56
1972	-4.13		0.00		11.42		23.93		41.94		47.07		54.29		53.74		43.40		32.39		25.53		7.53	a	28.09
1973	8.58		8.39		26.48		29.73		38.97		52.27		56.48		57.74		45.53		40.94		26.30		10.74		33.51
1974	4.42		0.86		16.74		30.57		38.16		47.07		56.81		53.42		40.33		35.23		26.40		16.42		30.53
1975	6.16		8.71		12.19		23.63		45.81		53.23		58.52		53.94		41.53		37.35		27.20		10.26		31.55
1976	1.16		12.86		16.29		31.80		37.71		53.13		54.16		51.65		41.60		30.10		16.60		-0.55		28.88
1977	-5.45		8.61		23.23		32.27		47.61		49.77		58.03		50.48		48.17		34.29		24.17		10.06		31.77
1978	2.70	a	1.57		11.81		26.83		42.45		48.23		54.71		54.39		49.77		35.97		22.33		5.87		29.72
1979	-2.26		-3.93		17.45		26.10		38.77		48.93		55.45		53.19		46.33		34.84		23.33		16.87		29.59
1980	6.35		3.83		13.26		31.10		42.90		48.30		55.97		57.13		45.47		31.87		26.27		9.35		30.98
1981	2.58		12.46		21.16		31.87		37.81		51.50		54.90		55.35		43.87		33.52		27.20		13.13		32.11
1982	-6.55		3.57		16.87		25.03		46.63	a	43.30		56.52		51.32		46.37		37.84		24.73		18.42		30.34
1983	11.55		18.04		22.16		28.33		36.35		49.80		60.10		58.03		47.69	a	34.70	a	25.71	b	0.23		32.72
1984	-5.42		16.21	a	10.97		32.07		37.52		52.28	a	53.13	a	56.55		43.11	b	38.60	a	21.41	a	9.19		30.47
1985	-1.45		1.68		20.10	a	32.07		42.90		46.20		52.13		52.29		44.50		33.48		17.93		-2.03		28.32
1986	0.83	a	1.86		16.14	b	34.17		42.68		47.30		56.97		49.81		46.87		32.68		16.55	a	12.97		29.90
1987	-----	z	12.29		19.06		32.63		41.70	a	52.47		57.00		53.10		44.57		29.20	a	24.00	a	15.81		34.71	a
1988	-3.39		-2.61	a	15.19		27.93	a	39.65		49.80		54.35		57.55		44.43		28.55		26.50		5.97		28.66
1989	6.40	a	-5.00		6.16		25.70		38.06		48.53		54.61		53.00		41.93		32.77		16.97		-3.18	c	26.33
1990	8.18	c	2.79		16.32		30.57		35.06		50.33		53.42		52.29		43.50		29.39		23.20		7.55		29.38
1991	-5.71		6.57		17.29		32.50		47.55		54.30		56.40	a	55.35		44.63		32.23		18.17		10.71		30.83
1992	9.55		9.21		15.87		29.87		-----	z	47.00	a	50.90		49.83	a	44.53		32.94		21.80		11.30	a	29.35	a
1993	1.45		3.07		15.30	a	27.67		41.55		48.60		56.26		55.73	a	40.33		31.55		19.97	a	14.27	a	29.65
1994	-11.06		-2.11	a	19.00		27.27		39.13		51.93		55.00		52.61		48.33		37.39		25.83		17.10		30.03
1995	10.19		7.11		19.03		25.40		40.00		55.40		57.48		60.52		43.37		38.19		15.34	a	5.16		31.43
1996	-6.16		-1.90		9.81		25.83		37.71		53.67		53.30	a	55.16		48.63		33.42		20.37		13.13		28.58
1997	2.87	a	7.32		14.70	a	26.43		36.23		52.50		54.77		51.13	a	47.87		33.87	a	21.72	a	20.29		30.81
1998	10.90	a	21.70	a	19.65		32.20		45.81		51.21	a	55.65		56.77		47.47		36.90		29.07		14.19		35.13
1999	0.87		12.00		18.26		32.43		44.10	a	52.80		59.97		54.39		45.40		31.42		27.50		11.52		32.55
2000	-0.87		6.62		24.39		28.50		43.84		50.77		53.87		54.33	a	44.10	a	36.45		26.90		1.94		30.90
2001	9.70	a	5.33	a	16.71		33.43		44.90		53.53		55.74		57.39		46.63		33.58		31.20		20.23		34.03
2002	15.87		15.07	a	11.90	a	30.20		37.35		54.07		59.93	a	56.19		49.93		30.97	b	21.30		15.61		33.20
2003	3.27	a	-3.50		12.55		26.83		39.45		49.60		55.68		57.32		47.97		34.03		25.37		15.83	a	30.37
2004	-1.32		4.97		19.21	b	27.76	a	40.03		48.11	b	53.90		50.61		48.90	a	36.45		25.27		7.53	a	30.12
2005	1.00		13.00		13.13		30.93		40.67	a	56.93		57.10		56.40	a	49.83	a	38.39		23.90		13.68		32.91
2006	15.39		5.75		18.32		32.83		45.10		50.83		58.00		54.74		43.43		31.65		27.00	a	18.42		33.46
2007	9.32		3.14		19.32		27.80		43.10	a	53.33		56.65		-----	z	48.53		40.87		23.70		8.74		30.41	a
2008	7.00		-2.14		11.32		29.90		38.77		53.10		56.97		52.42		48.53		35.70	k	24.07	a	3.00		29.36	a
2009	-7.90		8.21		15.19		29.33		40.06		49.60		51.65		52.81		47.77		33.68		28.90		7.87		29.76
2010	9.65		11.32		22.48		33.60		44.71		54.07		60.13		58.39		44.13		35.97		25.87		11.13		34.29
2011	3.39		9.25		17.74		28.46	b	42.48		51.00		59.94		55.90		45.30		36.68		27.17		15.87		32.77
2012	10.52		16.14		30.13		30.53		44.84		53.87		60.32		54.19		42.83		33.97		25.33		18.61		35.11
2013	7.29		3.04		13.19		26.60		41.10		51.50		57.19		54.68		46.20		35.90		22.67		2.32		30.14
2014	-5.84		-7.71		4.71		26.57		42.26		52.73		53.77		54.48		46.10		36.48		16.33		14.03		27.83
2015	2.87		-7.89		15.45		29.90		42.68		49.33		56.58		55.97		52.60		36.23		28.60		24.90		32.27
2016	7.55		12.79		23.00		28.60		42.16		52.87		57.74		59.39		51.97		38.39		29.90		11.26		34.63
2017	10.16		14.39		18.32		32.27		40.55		53.17		56.29		52.74		49.80		37.58		24.00		7.97		33.10
2018	4.26		2.21		15.74		21.23		46.03		52.50		58.16		58.10		49.10		33.65		20.50		16.35		31.49
2019	2.10		0.61		9.77		29.63		38.66	b	50.23		58.81		52.42		51.27		34.94		21.37		13.19		30.25
2020	13.74		7.59		23.39		26.87		41.19		52.27		60.35		57.06		45.93		30.35		26.87		17.52		33.59
2021	13.58		-0.54		22.16		32.60		41.00		55.97		56.58		57.90		48.00		43.61		23.93		14.26		34.09
2022	-2.29		1.00		17.26		29.67		45.10		51.40		57.06		57.06		48.63		34.29		26.13		14.23		31.63
2023	17.84		11.21		17.23		29.63		41.55		52.17		55.42		54.35		51.20		37.90		25.07		23.35		34.74
2024	14.26		18.52		21.93	a	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	18.24	i
Period of Record Statistics
MEAN	4.44		5.57		16.30		29.24		40.55		50.71		55.59		53.66		45.99		35.70		24.23		11.65		31.15
S.D.	6.20		6.09		4.87		3.00		3.31		2.96		2.51		2.59		2.93		3.25		3.61		5.48		1.81
SKEW	-0.12		0.07		0.09		0.13		0.13		0.15		0.62		0.24		-0.09		0.14		-0.37		-0.20		0.27
MAX	17.84		21.70		30.13		38.37		48.10		59.03		65.55		60.52		52.73		44.71		31.20		24.90		35.99
MIN	-11.65		-8.14		4.71		21.23		33.10		43.30		50.84		47.65		36.60		27.61		15.34		-3.18		26.33
YRS	123		124		124		122		121		122		122		122		123		123		121		124		111